Add the new websocket package (which is just a helper for kataras/neffos) and an example for go server, client, browser client and nodejs client. Add a .fossa.yml and the generated NOTICE file for 3rd-party libs. Update go.mod, go.sum. Update the vendor folder for pongo2 to its latest master as well

Former-commit-id: 89c05079415977d65e7328a1eb8a1c602d76f78a

_examples/websocket/basic/server.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"log"
+
+	"github.com/kataras/iris"
+	"github.com/kataras/iris/websocket"
+)
+
+const namespace = "default"
+
+// if namespace is empty then simply websocket.Events{...} can be used instead.
+var serverEvents = websocket.Namespaces{
+	namespace: websocket.Events{
+		websocket.OnNamespaceConnected: func(c *websocket.NSConn, msg websocket.Message) error {
+			log.Printf("[%s] connected to namespace [%s]", c, msg.Namespace)
+			return nil
+		},
+		websocket.OnNamespaceDisconnect: func(c *websocket.NSConn, msg websocket.Message) error {
+			log.Printf("[%s] disconnected from namespace [%s]", c, msg.Namespace)
+			return nil
+		},
+		"chat": func(c *websocket.NSConn, msg websocket.Message) error {
+			log.Printf("[%s] sent: %s", c.Conn.ID(), string(msg.Body))
+
+			// Write message back to the client message owner with:
+			// c.Emit("chat", msg)
+			// Write message to all except this client with:
+			c.Conn.Server().Broadcast(c, msg)
+			return nil
+		},
+	},
+}
+
+func main() {
+	app := iris.New()
+	websocketServer := websocket.New(
+		websocket.DefaultGorillaUpgrader, /*DefaultGobwasUpgrader can be used as well*/
+		serverEvents)
+
+	// serves the endpoint of ws://localhost:8080/echo
+	app.Get("/echo", websocket.Handler(websocketServer))
+
+	// serves the browser-based websocket client.
+	app.Get("/", func(ctx iris.Context) {
+		ctx.ServeFile("./browser/index.html", false)
+	})
+
+	// serves the npm browser websocket client usage example.
+	app.StaticWeb("/browserify", "./browserify")
+
+	app.Run(iris.Addr(":8080"))
+}